TEM Study of Microcrack Nucleation and Propagation for 310 Stainless Steel

被引：0

作者：

Hongqi Li Applied Science School UST Beijing Beijing ChinaQizhi Chen Applied Science School UST Beijing Beijing ChinaYizhong Huang Applied Science School UST Beijing Beijing ChinaYanbin Wang Applied Science School UST Beijing Beijing ChinaWuyang Chu Applied Science School UST Beijing Beijing China ^{[100083
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机构：

来源：

北京科技大学学报 | 1998年 / 03期

关键词：

310 stainless steel; in situ TEM tension; dislocation free zone; initiation of nanocrack;

D O I：

10.13374/j.issn1001-053x.1998.03.041

中图分类号：

TG142.15 [];

学科分类号：

摘要：

<正> TEM in situ tensile tests of 310 stainless steel show that a dislocation freezone (DFZ) forms if the displacement keeps constant after dislocations are emitted from acrack tip. The elastic DFZ is gradually thinned and the stress in the DFZ will reach thecohesive strength, resulting in nucleation of nanocracks in it and their bluntness into voids.If continuously tensioning, the inhomogeneously thinning ahead of the crack tip, initiat-ing and connecting of microcracks or microvoids will be observed rather than a DFZ,nanocracks' initiation and bluntness into voids. The inverse pile-up ahead of a loadedcrack tip can move back to the crack tip when unloading.

引用

页码：223 / 223

页数：1